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Can you specify secondary and tertiary fonts?
Can you pick a few fonts as a text attribute, so the device can fallback if the primary font isn't supported? For example, Avenir isn't built into iOS 5 (and I'm sure it's probably not a native Android font either), so can I make it fallback, or should I use a platform tag?
Customer support service by UserEcho
I will have to investigate this further in the morning. I am thinking by default that if you chose a font that is not supported in a previous version of OS, then it may default to Helvetica. I am sure there is probably a javascript you can use to control this. Let me find out and get back to you.
Ian